25494287 has 16 divisors (see below), whose sum is σ = 31520832. Its totient is φ = 20079360.

The previous prime is 25494263. The next prime is 25494299. The reversal of 25494287 is 78249452.

It is not a de Polignac number, because 25494287 - 2¹⁰ = 25493263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25494587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25073 + ... + 26069.

It is an arithmetic number, because the mean of its divisors is an integer number (1970052).

Almost surely, 2^25494287 is an apocalyptic number.

25494287 is a deficient number, since it is larger than the sum of its proper divisors (6026545).

25494287 is a wasteful number, since it uses less digits than its factorization.

25494287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298.

The product of its digits is 161280, while the sum is 41.

The square root of 25494287 is about 5049.1867662030. The cubic root of 25494287 is about 294.3162830977.

The spelling of 25494287 in words is "twenty-five million, four hundred ninety-four thousand, two hundred eighty-seven".